EP0553372A1 - Verfahren und System zur Überwachung von Lebensfunktionen - Google Patents

Verfahren und System zur Überwachung von Lebensfunktionen Download PDF

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Publication number
EP0553372A1
EP0553372A1 EP92101398A EP92101398A EP0553372A1 EP 0553372 A1 EP0553372 A1 EP 0553372A1 EP 92101398 A EP92101398 A EP 92101398A EP 92101398 A EP92101398 A EP 92101398A EP 0553372 A1 EP0553372 A1 EP 0553372A1
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EP
European Patent Office
Prior art keywords
data acquisition
acquisition unit
electronic data
patient
vital signs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92101398A
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English (en)
French (fr)
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EP0553372B1 (de
Inventor
Gerhard Pross
Malte Schlueter
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Hewlett Packard GmbH Germany
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Hewlett Packard GmbH Germany
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hewlett Packard GmbH Germany filed Critical Hewlett Packard GmbH Germany
Priority to EP92101398A priority Critical patent/EP0553372B1/de
Priority to DE69215204T priority patent/DE69215204T2/de
Priority to US08/001,183 priority patent/US5343869A/en
Priority to JP5034689A priority patent/JPH07163528A/ja
Publication of EP0553372A1 publication Critical patent/EP0553372A1/de
Application granted granted Critical
Publication of EP0553372B1 publication Critical patent/EP0553372B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/0205—Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
    • A61B5/02055—Simultaneously evaluating both cardiovascular condition and temperature
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H15/00—ICT specially adapted for medical reports, e.g. generation or transmission thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
    • A61B2560/04—Constructional details of apparatus
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
    • A61B2560/04—Constructional details of apparatus
    • A61B2560/0443—Modular apparatus
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
    • A61B2560/04—Constructional details of apparatus
    • A61B2560/0443—Modular apparatus
    • A61B2560/045—Modular apparatus with a separable interface unit, e.g. for communication
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
    • A61B2560/04—Constructional details of apparatus
    • A61B2560/0456—Apparatus provided with a docking unit
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
    • A61B2560/04—Constructional details of apparatus
    • A61B2560/0475—Special features of memory means, e.g. removable memory cards
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H40/00—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices
    • G16H40/60—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices
    • G16H40/63—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices for local operation
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H40/00—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices
    • G16H40/60—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices
    • G16H40/67—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices for remote operation

Definitions

  • the present invention relates to a method for retrieving and/or monitoring vital signs of a patient, wherein n ⁇ 2 sensors, such as electrocardiogram electrodes, a temperature sensor or a cuff for measuring non-invasive blood pressure, are applied to a patient, according to the preamble of claim 1.
  • n ⁇ 2 sensors such as electrocardiogram electrodes, a temperature sensor or a cuff for measuring non-invasive blood pressure
  • the invention also relates to a corresponding system for retrieving and/or monitoring vital signs of a patient.
  • US 4,916,441 describes a portable hand-held terminal of this kind.
  • the hand-held terminal may be carried by the nurse or the physician during patient visit, and later be connected with a personal computer or a hospital information system, in order to transmit data collected during patient visit from the portable unit to the remote system.
  • the disadvantage of this kind of portable unit is that all data entry has to be made manually (via a touch screen keypad, an alphanumeric keyboard or a bar code reader). That is, even measurements which could be made on an automatic basis (like blood pressure or temperature measurement) have to be made manually, and the acquired data (e.g., the thermometer reading) have then to be entered (also manually) into the portable hand-held terminal.
  • the known portable unit thus does not relieve medical personnel from performing manual measurements, but rather replaces the manual documentation in writing by "quasi"-automatic data acquisition ("quasi"-automatic here means that manual operation, i.e. manual entry of all vital signs information including blood pressure and temperature values, heart rate etc. is still necessary). This does not save a considerable amount of time. Further, although pencil and paper are no longer required, other complex tasks have now to be performed instead, such as multiple user identification etc. Therefore, the portable terminal described above does not adequately solve the underlying problem.
  • WO 89/00024 Another hand-held physiological monitor is described in WO 89/00024. This monitor provides connections to appropriate sensors, in order to receive electrocardiogram, temperature and respiration data.
  • a "specialist module” attachable to the main unit is used to measure other parameters, such as transcutaneous gases, pH or non-invasive blood pressure.
  • the latter hand-held physiological monitor is thus able to retrieve and monitor vital signs data by means of automatic data acquisition (e.g., temperature may be read in automatically, without the need to type the temperature value, or to operate a bar code reader).
  • automatic data acquisition e.g., temperature may be read in automatically, without the need to type the temperature value, or to operate a bar code reader.
  • this object is achieved, in a method of the kind described above, by the following steps:
  • n sensors are connected to the patient. Still there are less connections to the electronic data acquisition unit, namely m connections wherein m is smaller than n (m ⁇ n). This is achieved by providing combining means which effectively reduce the number of connections required. The combining means are then connected via linking means to the electronic data acquisition unit which is preferably a portable hand-held monitor.
  • the invention could also be expressed as a method for retrieving and/or monitoring vital signs of a patient, wherein at least two sensors, such as electrocardiogram electrodes, a temperature sensor or a cuff for measuring non-invasive blood pressure, are applied to a patient, which is characterized by the steps of:
  • the combining means is a combiner, which is a preferred embodiment of the invention.
  • other solutions to provide combining means such as feeding electrical leads to a common sheath, or providing a non-invasive blood pressure cuff which combines the leads of various electrodes, may be used as well. (The latter examples will be discussed below).
  • connection means in particular electrical connection means, are the preferred means for linking the combiner/combining means and the electronic data acquisition unit.
  • telemetric transmission e.g., wireless transmission using electromagnetic radiation, ultrasound, infrared light etc.
  • the first formulation of the present invention says that a number of linking means is provided which is smaller than the number of sensors. As outlined above, already this feature implies certain serious advantages over the prior art. However, it will be appreciated that the preferred solution is to provide a single cable or connector only, in particular a single electrical cable or connector.
  • n sensors are connected via m ⁇ n electrical cables, but also by additional linking means of another type, such as a pneumatic tube (which is required to perform non-invasive blood pressure monitoring). It is understood that such cases are covered by the present invention as well.
  • the cables of at least two different sensors are fed to a combiner (i.e. a common connector, or the like).
  • the combiner is usually placed near the patient (e.g., fixed to its bed via a clamp) and connectable with the electronic data acquisition unit via a single cable.
  • sensors such as electrocardiogram electrodes, a temperature sensor, or an oximetry sensor
  • the sensors are connected with said combiner, and the combiner is left near the patient.
  • the nurse enters the room she has simply to connect the electronic data acquisition unit with the combiner, and wait until the required vital signs information has been transmitted. The same may happen the next day, and so on.
  • She may simply walk from bed to bed, connect a patient to her electronic data acquisition unit with a single movement, disconnect the patient, and then she is ready to connect the next patient. This makes handling quick, easy and comfortable, and does not require expensive equipment. She may also type patient or vital signs information not subject to automatic data acquisition (e.g., medications) directly on a keypad or the like of the electronic data acquisition unit.
  • automatic data acquisition e.g., medications
  • the method according to the present invention also provides full flexibility, as all sensors required for a specific patient may preferably be connected with the combiner.
  • the set of sensors used may be different from patient to patient; however, there is no need to replace equipment as the nurse moves around.
  • the present invention also avoids any confusion and cable mix-up encountered when a multiplicity of cables have to be operated and connected.
  • Typical vital signs suited for retrieving and/or monitoring according to the present invention include:
  • these vital signs need not necessarily be stored, monitored or otherwise processed as real-time waves. Instead, it is also possible to process trend values, histograms, mean values or other derived parameters which allow a greater degree of data compression. For example, instead of processing the electrocardiogram, the pulse (heart rate) could be used instead.
  • the single cable between the combiner and the electronic data acquisition unit is not the only solution suited for practicing the present invention.
  • the combiner may be directly applied to a single jack or the like incorporated in the electronic data acquisition unit, such that no intermediate cable is necessary.
  • more than one cable may extend between the combiner and a single connector provided for connection with the electronic data acquisition unit.
  • Such a design may particularly be chosen if the monitoring capability covers non-invasive blood pressure; in this case, an electrical cable, as well as a pneumatic tube or hose, will extend beyond the combiner and a connector. All of these environments are covered by the present invention.
  • the application of the present invention is further not limited to hospitals. It may also be useful in the doctor's practice, in obstetrical care units, rehabilitation centers, the introduction room, the neonatal ward, in an emergency vehicle or emergency case, at the patient's home, in the exercise room, industry centers, upon home visits and the like. It may also be used for quasi-"permanent" monitoring of a patient during transport (e.g., in an emergency vehicle, or during patient transport from the introduction room to the operating theatre, or from the operating room to the recovery room), in particular if it is a portable hand-held monitor. In such cases, the electronic data acquisition unit may be connected with the patient over longer time periods and accompany him, and it provides complete monitoring, e.g. from an event (like a car crash) and during the ambulatory situation and transport, until the patient arrives in the hospital. If the electronic data acquisition unit is equipped with storage capabilities, as will be discussed below, the complete patient history can be recorded.
  • the electronic data acquisition unit is portable, in particular a hand-held monitor.
  • the present invention is not limited to this kind of data acquisition unit.
  • the combiner approach makes it useful for stationary monitors, and other medical devices, as well.
  • a hospital with an introduction room, an operating theatre and a recovery room.
  • the applied sensors, and the combiner may accompany him (i.e., they are not removed), whereas he will be connected with different stationary electronic data acquisition devices in every room.
  • the single cable/connector approach makes interconnection with the various stationary monitors easy, as only a single connection has to be established.
  • the inventive method is further characterized by the step of displaying the vital signs information on a display, preferably a liquid crystal display, built in the electronic data acquisition unit.
  • a display preferably a liquid crystal display
  • the additional step of storing the vital signs information in the electronic data acquisition unit is provided.
  • the information is stored for later processing.
  • the following additional steps may preferably be performed:
  • the vital signs information collected from a patient, or from a multiplicity of patients, may thus be "downloaded" to a remote computer for further processing.
  • the remote computer may be able to calculate further derived parameters, generate a printout, and the like.
  • the data may further be used in a hospital information system which is also used to administer other data, e.g. diagnostic data and/or administrative data.
  • the remote computer is a personal computer, it may be located in the nurse's office or the like. It may also be a laptop computer, etc.
  • patient information is transmitted from the remote computer to the portable electronic data acquisition unit. That is, the patient's name, his clinical history, an administrative number assigned to the patient, his health insurance or related data may be "uploaded” from the remote system to the portable electronic data acquisition unit.
  • the nurse may recall this information at any point in time as she is making her round.
  • a patient identifier is particularly helpful if vital signs of a multiplicity of patients are to be collected.
  • the nurse may recall the prestored patient identifier prior to data acquisition, such that the vital signs information is correctly assigned to a particular patient. This may be done by a simple keystroke. Another keystroke may cause the portable electronic data acquisition unit to store the vital signs information of the patient.
  • the data uploaded from a remote computer to the portable electronic data acquisition unit may also comprise patient care-related information, alarming information or scheduling information.
  • patient care-related information e.g., a nursing woman's schedule
  • alarming information e.g., a scheduling information
  • scheduling information e.g., a scheduling information.
  • she may always check her duties as she is making her round, and she may even be alarmed or alerted automatically (e.g., by means of an optical or acoustic alarm) of appointments and the like.
  • a patient care plane could also be uploaded.
  • the portable monitor may remind the nurse of medications and other treatments due, either by displaying the care plan, or by an acoustic alarm. Further, the portable monitor may request a confirmation of effected patient treatment, and store the confirmation. If this information is later transmitted to a remote computer, a complete history, including control over performed measures, is available.
  • An alarm function (optical, acoustic or otherwise) may also be provided in case a parameter - e.g., heart rate -, exceeds a limit.
  • the invention also relates to a system for retrieving and/or monitoring a multiplicity of vital signs of a patient, comprising
  • a “multiplicity" of vital signs means at least two.
  • the above system is characterized by the following features:
  • the inventive electronic data acquisition unit comprises preferably a display, e.g. a liquid crystal display, for displaying the vital signs information, and/or memory means for storing the vital signs information.
  • a display e.g. a liquid crystal display
  • the electronic data acquisition unit may advantageously be connectable with a base station.
  • the base station may be a computer, or it may be connectable with a remote computer, in order to exchange data with the portable electronic data acquisition unit, e.g. for "download" of vital signs information, or for "upload” of patient data.
  • the portable electronic data acquisition unit may advantageously be provided with data input means, e.g. a small keyboard or a touch keypad, such that recall of patient information is easy. Further, such input means may be used to enter information which cannot be measured on an automatic basis, for example medication or clinical events, or for confirmation purposes.
  • data input means e.g. a small keyboard or a touch keypad
  • a base station comprises preferably supporting means for the portable electronic data acquisition unit. Electrical connection with the base station and/or a remote computer may then be established by means of an electrical cable plugged into the portable unit, or - in a preferred embodiment - in that the supporting means of the base station includes automatic electrical connection means, in particular an electrical connector at the bottom of the supporting means, which engage with corresponding electrical connection means at the bottom of the portable electronic data acquisition unit. Further, such electrical connectors may be used to recharge a battery in the portable unit.
  • the base station may further comprise a recorder, such that an immediate printout of the vital signs information (e.g., the electrocardiogram) is possible, and/or a housing for accessories, which may be used by the nurse such that anything required for her patient visits is at a single location.
  • a recorder such that an immediate printout of the vital signs information (e.g., the electrocardiogram) is possible, and/or a housing for accessories, which may be used by the nurse such that anything required for her patient visits is at a single location.
  • a memory is integrated into a memory module, and the memory module is insertable into a remote station which preferably contains a multiplicity of insertion slots.
  • Each memory module may e.g. be assigned to a specific patient, or to a group of patients. It is thus possible to store and later download vital signs information, or to upload patient-care related or other information, in patient-specific manner.
  • the memory modules may be inserted into a remote station able to house one, or a multiplicity, of such memory modules, in order to download vital signs information, or to upload the patient care plan, the nurse's schedule and the like.
  • the remote station may be equipped or in connection with a personal or host computer.
  • the remote station is connected with a host computer via a wireless link, such that the remote station may be located e.g. in the nurse's office, or that the nurse may even carry it with her as she is making her round.
  • a display/memory module is used; i.e., the display and the memory are contained in a removable module.
  • this is not a mandatory requirement of the present invention.
  • a blood pressure cuff may also be used as combining means. Such cuffs are required for non-invasive blood pressure monitoring.
  • an electrode, or a multiplicity of electrodes, or sensors of other kind may be integrated into such a cuff, preferably at its inner wall. Examples of suitable electrodes are an electrocardiogram electrode, a respiration electrode, or an oxygen saturation (preferably pulse oximetry) sensor.
  • the wiring may then be performed inside the cuff, or in the walls of the cuff.
  • a pneumatic tube and an electrical cable connect the cuff with the electronic data acquisition unit. Instead, the electrical leads may also be integrated into the walls of the pneumatic tube. It is understood that this aspect of the invention may also be used separately of, i.e., without the other features of the present invention.
  • the invention also relates to an electronic data acquisition unit for medical purposes, comprising a portable housing and characterized by a single connector for receiving a multiplicity (at least two) of vital signs of a patient.
  • the housing of this electronic data acquisition unit includes preferably a display, a memory and/or a key pad.
  • the memory may be removable, as outlined above.
  • a portable hand-held monitor for monitoring vital signs is in general designated as 1. It comprises a keyboard 2, which is only schematically indicated and may be an alphanumeric keyboard, or - preferably - a specialized keyboard which is easier to be operated by medical personnel (an example of such a keyboard will be discussed below).
  • Portable hand-held monitor 1 further comprises a liquid crystal display 3 for displaying vital signs. In the shown example, these are the ECG (electrocardiogram) trace 4, the heart rate 5 and a temperature trace 6 (which is usually a time-compressed version called "trend", i.e., ECG trace 4, and temperature trace 6 do not have the same scaling of the time axis). It is understood that LCD display 3 may be used to display other physiological parameters and other vital signs as well.
  • Portable hand-held monitor 1 further comprises storage means, such as integrated circuit memories, for storing vital signs and other patient-related data. These memories are incorporated in the housing of hand-held monitor 1 and are not shown in Fig. 1.
  • a major feature of portable hand-held monitor 1 is the single jack 7 provided for automatic input of vital signs information.
  • a plug 8 engages jack 7 and is in connection with a single electrical cable 9 leading to a combiner 10.
  • a multiplicity of single cables 11a to 11d provide connection with physiological transducers (not shown in Fig. 1); for example, cables 11a and 11b could be connected with ECG electrodes, cable 11c could be connected with a temperature probe, and cable 11d could be in connection with a finger sensor for pulse oximetry. Cables 11a to 11d end up in plugs 12a to 12d which are inserted into appropriate jacks of combiner 10.
  • the combiner combines the electrical leads so that the signals can be transmitted through a single cable 9, e.g. in parallel mode (a parallel/serial shift in combiner 10, and subsequent serial transmission via cable 9, is also possible).
  • the number of plugs 12a to 12d namely four in Fig. 1, is arbitrary.
  • Combiner 10 could also be designed to receive three, six or any other numbers of sensor plugs.
  • the jacks of combiner 10 are not necessarily assigned to specific sensor plugs, i.e., pulse oximeter plug 12d could not only be inserted into the rightmost jack in Fig. 1; instead, the jacks or slots of combiner 10 may preferably be assignable to any possible sensor plug, such that plugs 12a to 12d could be interchanged, or that plugs of other sensors (such as respiration or blood gases) could be inserted as well.
  • combiner 10 could also be directly applied to jack 7. Further, combiner 10 could be connected with plug 8 via an electrical cable, as well as a pneumatic tube; such would particularly be useful in case of non-invasive blood pressure monitoring (the valves, and the pump, would be incorporated in portable hand-held monitor 1 in this case). In the latter case, the electrical cable and the pneumatic tube could be fixed to each other, and an electrical, as well as a pneumatic connector could be provided on the top of portable hand-held monitor 1. (Such an embodiment will be described below). Further, in case a pneumatic connection is required, one of the jacks or slots of combiner 10 could be a pneumatic connector specifically assigned to NIBP (non-invasive blodd pressure) monitoring.
  • NIBP non-invasive blodd pressure
  • FIGS. 2a and 2b show how portable hand-held monitor 1 may be used for patient monitoring.
  • portable hand-held monitor 1 is connected via cable 9 with combiner 10.
  • the combiner is placed or fixed near or at the bed of a patient 13.
  • a multiplicity of sensor cables 11a to 11d interconnect combiner 10 with sensors or transducers applied to or attached to patient 13.
  • portable hand-held monitor 1 is ready for data acquisition, i.e. for acquiring vital signs information, which can be stored in the internal memory of portable hand-held monitor 1, as well as be displayed on its built-in liquid crystal display 3.
  • Fig. 2b illustrates the environment in the nurse's office.
  • Portable hand-held monitor 1 is placed on an appropriate support of base unit 14.
  • the connectors serve a two-fold purpose: First, data transmission from and to the portable hand-held monitor is established and, second, a rechargeable battery pack contained in the hand-held monitor is recharged.
  • Base station 14 is connected (line 15) with a personal computer or terminal 16 which, in turn, may be connected with a hospital network (not shown).
  • the data communication link is used to "download” (from the portable hand-held monitor 1 to personal computer 16) vital signs information, and to "upload” (from personal computer 16 to portable hand-held monitor 1) patient data like the patient's name, a patient identifier or details of his case history.
  • the portable hand-held monitor may also generate an alarm in case that one of the patient's vital signs exceeds predefined limits. Such limits may be entered via the portable hand-held monitor's keyboard, or be "uploaded” from a base or remote station.
  • the above described method of patient monitoring is not restricted to application by a nurse. Instead, the portable hand-held monitor 1 could also be used in a doctor's practice, or the like.
  • the data "uploaded" into the portable hand-held monitor could also be a patient care plan, i.e., medications and other treatments prescribed by the doctor.
  • the portable hand-held monitor could then remind the nurse automatically of medicines etc. to be applied to the patient as soon as she calls the patient up or connects him.
  • the portable hand-held monitor could compare the nurse's activities with the patient care plan and remind her, or cause otherwise an alarm, if she misses anything.
  • the nurse is supposed to confirm or acknowledge certain activities, e.g. patient treatment, via the keyboard of the portable hand-held monitor, such acknowledgement could be stored and later be transmitted, via the base station, to a personal computer in the nurse's office, or to a hospital computer (an embodiment with removable memory modules and a remote station suited to transmit such a protocol will also be described later).
  • the personal or hospital computer may then document the fact that the patient has appropriately been treated, e.g., generate a printout, such that a complete history of patient treatment, and control over performed measures, is available.
  • Fig. 3 depicts a more detailed top view of portable hand-held monitor 1.
  • the liquid crystal display is designated as 3, as in the former figures.
  • Five buttons 17a to 17e are used to control operation of the hand-held monitor. For example, one of these buttons or keys could be used to recall the patient names, a second one could be used to move a cursor from patient to patient, and a third one could serve to select a specific patient. Another one could be used to initiate the storing cycle, and so on.
  • Plug 8 which fits into connector or jack 7, is a multi-pin plug, as it is known in the art. Cable 9 is only shown partially.
  • the housing of the portable hand-held monitor is generally designated as 19.
  • Fig. 4 depicts the rear side of portable hand-held monitor 1, wherein the same reference numbers have been used as in the preceding drawings.
  • a connector 20 is provided which, when the portable hand-held monitor is at rest on the base station, engages with a corresponding connector at the top side of the base station, in order to establish data transmission and recharging paths, as described above.
  • a removable door 21 covers a rechargeable battery pack.
  • a suspension eye 22 may be used to hang up the portable hand-held terminal 1 if required.
  • suspension eye 22 is slidably supported, as indicated by arrow 23.
  • a combiner according to the present invention is shown in Fig. 5a. It consists of a main housing 24 provided with a single cable 25 for interconnection with the portable hand-held monitor (this cable corresponds to cable 9 in the preceding figures).
  • Several plugs 26a to 26e are inserted into corresponding jacks of combiner 24.
  • the plugs 26a to 26e are connected with cables 27a to 27e which, in turn, establish electrical contact to single sensors or transducers (not shown in Figs. 5a and 5b).
  • a tube or hose 28 connects combiner 24 with a cuff for non-invasive measurement of blood pressure; a pneumatic connector 29 is provided therefor.
  • Fig. 5b depicts in more detail the jacks for insertion of plugs 26a to 26e.
  • one of these jacks is referred to as 30a and 30b.
  • the openings have been selected such (opening 30a rectangular and opening 30b circular) that the corresponding plugs can only be inserted in the correct position.
  • Fig. 6 depicts another example of a combiner 31 according to the present invention.
  • its housing is provided with a clamp 32 for attachment to a rod 33 which may be positioned near, or attached to, the patient's bed.
  • Interconnection cable 34 (which leads to the portable hand-held monitor), plugs 35a to 35e and cables 36a to 36e (which lead to the single sensors or transducers) are similar to those already discussed above.
  • FIG. 7 An example of a base station, generally designated as 37, is shown in Fig. 7. It consists of three detachable parts 37a, 37b and 37c. Part 37a provides a support 38 for portable hand-held monitor 1. In the shown position, electrical contact between the base station and the hand-held monitor is established.
  • Part 37b houses a strip chart recorder for immediate printout of vital signs information. This is particularly useful if no remote computer is connected, or if there is not sufficient time to wait for a printout of the remote computer.
  • an ECG trace 39 and a temperature trace 40 are recorded on recorder paper 41.
  • the recorder paper may e.g. be thermal paper or the like.
  • Part 37c is an accessories housing which houses equipment regularly used by the nurse when she is caring for patients, like a stethoscope, and so on. It may be opened by a handle 42.
  • the interconnection between portable hand-held monitor 1 and patient 13 is performed by means of wireless transmission.
  • several sensors are applied to patient 13, the sensors being connected by sensor cables 11a to 11d with a combiner 43.
  • the combiner 43 contains a wireless transmitter, such as a radio, ultrasound, or infrared light transmitter.
  • Portable hand-held monitor 1 contains a corresponding receiver.
  • the wireless link, indicated by numeral 44 also constitutes a link, or linking means, in the sense of the present invention. Such an arrangement may be particularly useful if a multiplicity of patients are subject to monitoring, as it is not necessary to establish a cable link for any of the patients.
  • FIG. 9 An alternative embodiment incorporating non-invasive blood pressure sensing means is depicted in Fig. 9.
  • a tube 45 and a cable 46 connect the combiner 10 with portable hand-held monitor 1.
  • Tube 45 and cable 46 are held together by elastic strips 47 or the like, in order to avoid that they have to be handled separately. They end at respective connectors 48 and 49 of portable hand-held monitor 1, wherein connnector 48 is a pneumatic connector, and connector 49 is an electrical one.
  • connnector 48 is a pneumatic connector
  • connector 49 is an electrical one.
  • two connectors 48 and 49 are used in this embodiment, it will be appreciated that still only a single electrical connector is required.
  • tube 45 and electrical cable 46 not as separate connections, but rather to integrate the electrical leads into the walls of the pneumatic tube. In the latter case, no strips 47 are required.
  • Fig. 10a depicts a portable hand-held monitor 1' with removable display/memory section 50.
  • the memory in display/memory section 50 may e.g. contain vital signs information previously gathered from a patient.
  • a multiplicity of display/memory sections (or modules) 50a to 50i may be inserted into a remote station 51.
  • the remote station may for example be installed in the nurse's room and be connected with a central computer, e.g., a hospital computer.
  • Each display/memory section 50a to 50i may be assigned to a specific patient, or to a group of patients (e.g., one display/memory section for all patients in a specific room).
  • the remote station 51 or the remote computer to which it may be connected, is programmed to "upload” vital signs information from all of the display/memory sections. Further, it may be programmed to "download” patient information, patient care-related information or the like into the various display/memory sections.
  • the nurse collects the display/memory sections of the patients she wants to visit.
  • Patient care information such as necessary medication, is already stored in these display/memory sections.
  • she puts this patient's display/memory module into her portable hand-held monitor.
  • She may control now the necessary medications, apply them to the patient, and acknowledge it on her portable hand-held terminal.
  • the confirmation that the patient has got its medicine is stored in the patient's display/memory module and later transmitted to the remote station (or a connected hospital hospital computer), when the display/memory module has been put in a slot of remote station 51 again.
  • the patient's vital signs information is loaded into the display/memory module, and later also transmitted to the remote station/hospital computer.
  • the remote station 51 may not only be located in the nurse's office. She may, e.g., also carry it on a cart which she is taking with her during her round. This makes selection of patient display/memory modules easier, as less preparation has to be done in advance. In such a case, but not limited to it, nor as a necessary prerequisite thereof, it is advantageous to have the remote station 51 connected with a hospital computer via a telemetric link.
  • Fig. 11a depicts another concept of linking the portable hand-held monitor 1 with a patient.
  • a cuff 52 is applied to the patient's arm 53.
  • the cuff is connected with portable hand-held monitor 1 via a pneumatic tube 54 and an electrical cable 55 (which may be combined in the way Fig. 9 shows; a single pneumatic cable with the electrical leads integrated into its walls, as described above, may be used instead).
  • Fig. 11b depicts details of cuff 52.
  • Pneumatic tube or hose 54 is used to inflate and deflate the cuff, as is known in the art.
  • Various electrodes which come into contact with the skin of the patient's arm as soon as the cuff is applied, are arranged at the inner wall of the cuff. These are, by way of example, an electrocardiogram electrode 56 and a respiration electrode 57.
  • a reflection oximetry sensor 58 is also provided which irradiates electromagnetic readiation into the tissue (e.g. by means of a light-emitting diode) and measures the backscattered light.
  • Electrodes 56 and 57 are laid in the inner or outer wall of cuff 52. They are all fed to electrical cable 55 which connects the cuff with the portable hand-held monitor.
  • FIG. 11c A slightly different cuff configuration is depicted in Fig. 11c.
  • all of the electrical leads are fed to the pneumatic connection.
  • the electrical leads are further fed through the walls of pneumatic tube 54, such that no additional electrical cables are required.
  • FIG. 12 Yet another embodiment of the present invention is shown in Fig. 12. Again, several sensors or transducers are applied to the patient. Their respective electrical leads 11a to 11c are fed into a common cable or sheath 59. In this embodiment, the opening of cable 59 (indicated by reference number 60) acts as a combiner, i.e., is a combining means.

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EP92101398A 1992-01-29 1992-01-29 Verfahren und System zur Überwachung von Lebensfunktionen Expired - Lifetime EP0553372B1 (de)

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EP92101398A EP0553372B1 (de) 1992-01-29 1992-01-29 Verfahren und System zur Überwachung von Lebensfunktionen
DE69215204T DE69215204T2 (de) 1992-01-29 1992-01-29 Verfahren und System zur Überwachung von Lebensfunktionen
US08/001,183 US5343869A (en) 1992-01-29 1993-01-07 Method and system for monitoring vital signs
JP5034689A JPH07163528A (ja) 1992-01-29 1993-01-29 生命徴候情報を収集し、監視する方法とそのシステム

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Also Published As

Publication number Publication date
JPH07163528A (ja) 1995-06-27
US5343869A (en) 1994-09-06
DE69215204D1 (de) 1996-12-19
EP0553372B1 (de) 1996-11-13
DE69215204T2 (de) 1997-03-13

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